Where: Alaska (57.3° N, 156.4° W: paleocoordinates 30.6° N, 90.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Shelikof Formation, Callovian (166.1 - 163.5 Ma)

• Fossils occur in limestone concretions forming part of a coarse conglomerate from 5 to 45 ft above the top of the lower siltstone member of the Shelikof formation

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary conglomerate

Size class: macrofossils

Preservation: concretion

Collected by R.W. Imlay, D.J. Miller in 1948; reposited in the USNM

Primary reference: R. W. Imlay. 1953. Callovian (Jurassic) ammonites from the United States and Alaska Part 2. Alaska Peninsula and Cook Inlet regions. United States Geological Survey Professional Paper 249-B:41-108 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 158958: authorized by Matthew Clapham, entered by Matthew Clapham on 23.07.2014

Creative Commons license: CC BY (attribution)